ast-grep
SkillSearchGuides your agent in running ast-grep commands to search code by syntax structure in Rust or TypeScript.
Available today. Use it from your connected AI after setup.
No other account needed.
Connect ahel once, and every AI you use reads what you have installed.
Then ask your AI: use the ast-grep skill
About this capability
Guides ccusage structural code searches with ast-grep. Use when finding Rust or TypeScript syntax patterns, validating migrations, or writing AST-based search commands.
What this skill tells your AI
The instructions your AI receives, as published by ccusage/ccusage in .agents/skills/ast-grep/SKILL.md and read by ahel’s review.
Reach for ast-grep when a search depends on syntax structure — a macro call with
particular arguments, a match arm shape, an attribute on an item. rg is faster
for plain text, and reduce-similarities owns duplicate-code detection.
ast-grep comes from the Nix dev shell, so prefix with direnv exec . when the
shell is not already active. There is no sgconfig.yml here: relational rules go
through scan --inline-rules or a throwaway --rule file rather than a project
rule set. Scoping to rust, apps, docs, or nix keeps large searches quick,
though a bare root search already skips gitignored trees.
Start with run --pattern and widen only if it under-matches. Give relational
rules stopBy: end, or they stop at the first node in that direction. When a
pattern does not match the shape you expected, dump the parse with
--debug-query.
Signals
- GitHub stars
- 18k
- Forks
- 821
- Last commit
- Sep 2026
- Hacker News mentions
- 5
Advanced
- Catalog kind
- skill
- Gateway key
ast-grep-ccusage- Source
- github.com/ccusage/ccusage